Cell wall: strong; supporting layer around the cell membrane in plant cells
When cells become unable to regulate the cell cycle, tumors can develop.
The muscles of the muscular system keep bones in place; they assist with movement by contracting and pulling on the bones. To allow motion, different bones are connected by joints which are connected to other bones and muscle fibers via connective tissues such as tendons and ligaments.
Answer:
carbon dioxide that enters through the leaf
openings
Explanation:
